You may not find these factors particularly surprising, but it should be reassuring to have them validated through a more rigorous method than mere anecdotes. While the scientific objective approach provides valuable insights, hopefully, it is understandable that the presentation might come across as somewhat 'dry' so if you want something more useable, practical and in a different style, try this video.

Or, from a different perspective - here are my answers to questions you should ask any potential executive coach.